| Title | Precambrian bedrock geology, Southampton Island, Nunavut |
| Download | Downloads |
| Author | Sanborn-Barrie, M; Chakungal, J; James, D T; Rayner, N; Whalen, J B |
| Source | Geological Survey of Canada, Canadian Geoscience Map 132, 2014, 1 sheet, https://doi.org/10.4095/293328 |
| Year | 2014 |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | geological, bedrock geology, structural features, 1:250,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 17 (NAD83) |
| Media | digital; on-line |
| File format | readme
|
| File format | pdf; rtf; shp; xls; xml |
| Province | Nunavut |
| NTS | 46A; 46B; 46C; 46D; 46F |
| Area | Southampton Island |
| Lat/Long WENS | -87.0000 -80.0000 66.2500 63.7500 |
| Subjects | stratigraphy; structural geology; bedrock geology; basement geology; igneous rocks; mafic rocks; diorites; granodiorites; metamorphic rocks; metasedimentary rocks; psammites; pelites; ironstone;
granites; metamorphism; mineral potential; structural features; folds; faults; Precambrian; Proterozoic |
| Illustrations | photographs |
| |
| Program | Multiple Metals - Cumberland Peninsula (Baffin Island, Nunavut), GEM: Geo-mapping for Energy and Minerals |
| Image |  |
| Released | 2014 05 28 |
| Abstract | Southampton Island, Nunavut, is situated between the Archean-dominated western Churchill Province and the Paleoproterozoic Baffin-Ungava segment of the Trans-Hudson Orogen. The island exposes a highland
of Precambrian basement across much of its eastern half and flat-lying Paleozoic carbonate strata across its western half. The Precambrian basement complex consists predominantly of 3000-2700 Ma tonalitegranodiorite-granite gneiss, containing
enclaves and inclusions of ca. 3 Ga maficultramafic-anorthositic plutonic rocks and lesser metasedimentary rocks. A smaller proportion of Paleoproterozoic gabbroic and granitic plutons also occurs. These rocks experienced profound amphibolite- to
granulite-facies tectono-metamorphic reworking at 1880-1820 Ma, during the Trans-Hudson Orogen collision between the Rae and Superior cratons, resulting in their strongly foliated to gneissic character, followed by exhumation and cooling at 1790-1780
Ma. |
| Summary | (Plain Language Summary, not published)
This map portrays a new understanding of the Precambrian bedrock geology of Southampton Island, Nunavut. The island exposes Precambrian basement rocks
in its eastern highlands and flat-lying Paleozoic carbonate strata in the west. The basement complex consists predominantly of 2.77-2.70 billion year old felsic gneiss, enclosing mafic-ultramafic-anorthositic plutonic rocks which date back to 3
billion years, as well as some metasedimentary rocks. These rocks were buried and heated 1.88 to 1.82 billion years ago, reflecting mountain-building in the collision zone between the Rae and Superior cratons- mountains that were subsequently deeply
eroded. |
| GEOSCAN ID | 293328 |
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